- Fix: Avoid errors occurring in Chrome now for supportsGoodTextCharPos

- Linting: Avoid Jamilih file in doc linting
- Testing: Add testcafe (ESLint plugin/rules, accessibility test
  (failing), ui test beginnings (passing))
- Docs: Add "Testing" prefix to contributing file
- npm: Bump to 3.0.0-rc.3

editor/browser.js

@@ -71,7 +71,7 @@ try {
 return false;
 }());
 
-// text character positioning (for IE9)
+// text character positioning (for IE9 and now Chrome)
 const supportsGoodTextCharPos_ = (function () {
 const svgroot = document.createElementNS(NS.SVG, 'svg');
 const svgcontent = document.createElementNS(NS.SVG, 'svg');
@@ -81,9 +81,14 @@ svgroot.append(svgcontent);
 const text = document.createElementNS(NS.SVG, 'text');
 text.textContent = 'a';
 svgcontent.append(text);
-const pos = text.getStartPositionOfChar(0).x;
-svgroot.remove();
-return (pos === 0);
+try { // Chrome now fails here
+  const pos = text.getStartPositionOfChar(0).x;
+  return (pos === 0);
+} catch (err) {
+  return false;
+} finally {
+  svgroot.remove();
+}
 }());
 
 const supportsPathBBox_ = (function () {

editor/xdomain-svgedit-config-iife.js

@@ -2669,7 +2669,7 @@
     } catch (err) {}
 
     return false;
-  }(); // text character positioning (for IE9)
+  }(); // text character positioning (for IE9 and now Chrome)
 
 
   var supportsGoodTextCharPos_ = function () {
@@ -2681,9 +2681,16 @@
     var text = document.createElementNS(NS.SVG, 'text');
     text.textContent = 'a';
     svgcontent.append(text);
-    var pos = text.getStartPositionOfChar(0).x;
-    svgroot.remove();
-    return pos === 0;
+
+    try {
+      // Chrome now fails here
+      var pos = text.getStartPositionOfChar(0).x;
+      return pos === 0;
+    } catch (err) {
+      return false;
+    } finally {
+      svgroot.remove();
+    }
   }();
 
   var supportsPathBBox_ = function () {